Most trials do not yield perfect data, however.

Some of these proposed modifications have already been tried out on the Indian Railways, however, the trials have not yielded a consistent positive feedback.

Clinical trials published in 2008 yielded the first triple pregnancy using a vitrification method (as opposed to the traditional slow-freeze method).

A trial of Hutchinson-Foster in September-October 2012 yielded new evidence and reports on the case, but the jury failed to reach a verdict.

He said he questioned if the trial would yield any meaningful data.

Other clinical trials have yielded mixed results.

Clinical trials yield important information on a medical product's safety, dosing, and effectiveness, which is the basis for FDA approval and product labeling.

Smaller trials have yielded mixed results and have shown that the respective traditional methods of exercise are superior to their video game equivalents.

But her supporters say that a new trial, or a plea deal, could yield a better outcome.

Some studies have suggested that selenium can help protect against certain cancers, but clinical trials on selenium supplementation have yielded conflicting results.